Question

evaluate (3a‐5)(3a+5)​

Answer 1

Answer:

Step-by-step explanation:

3a^2- 5^2

9a^2- 25

Answer 2

To evaluate : $( 3a - 5 ) ( 3a + 5)$

Solution :

• According to question we are asked to evaluate the expression $( 3a - 5 ) ( 3a + 5)$ .
• To evaluate the given expression we multiply both the terms one by one to another terms .
• Therefore , $( 3a - 5 ) ( 3a + 5) = 9a^{2} + 15a - 15a - 25$
• After multiplying on solving the equation by simple addition and     subtraction we get ,            $= 9a^{2} -25$

Hence , on evaluating $( 3a - 5 ) ( 3a + 5)$  we get $9a^{2} - 25$.